Can you comment if this existed with the 2.6.26 kernel or is this specifically a regression from 2.6.26 to 2.6.27. You should be able to test teh 2.6.26 kernel with the Alpha4 Intrepid release - http://www.ubuntu.com/testing . Thanks.

I appear to be encountering this bug on 2.6.27-7. Pretty frequently, certain applications hang, seemingly at random. I've been trying to keep my eye on them in the System Monitor, and whenever it happens, the waiting channel reports "futex_wait".

I have been searching a bit for a fix for this error, which began when I updated to Intrepid. So far, I've come up with little.

I also am encountering problems with hrtimer_nanosleep, which causes gksu to fail. Not sure if that's related.